garnier



L.v GARNIER.

VACUUM FEED TANK FOR INTERNAL C'OMBUSTION ENGINES,

APPLICATION FILED IAII.22. 1920.

Patented Apr. 12, 1921'.

v2 SHEETS-SHEET I.

I' l' I L. GARNIER,

VACUUM FEED TANK FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED 1AN.22.1920.

Mf Paru-@meal ma 192i.

2 SHEETS-SHEET 2.

"if, @y

ATT/yf UNITED STATES PATENT OFFICE.

IIONCE GARNIER, OESAN SEBASTIAN, SPAIN.

VACUUMFEED TANK FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Pgatfgmgd APL 12 19:21h

Application filed January 22, 1920. Serial No. 353,186.

! 10 all 11i/lam t may conce/m Be it lnown that l, LnoNcn GARNIER rllhis invention relates to a vacuum feedg uset'ul Improvements in Vacuum- F eed 'ianls for Internal-Combustion Engines, oi which the following is a specification.

tanlr for internal combustion engines of th 'type comprising a tloat chamber and a de.

wie

livery chamber, which are in communica tion with each other preferably by memes` o1 an automatic check valve. In said lrnown;A

devices, the float chamber is connected t the main fuel tanlr located on a level beloi that of the float chamber and the latter ma be put in communicationV either with source oll depression such as the admission pipe of the engine, or with the atmosphere;

the delivery chamber is connected to a carburetor; the lloat chamber contains a float which operates a controlling member for the suction and a controlling memberI for the inlet oi atmospheric air.

According to one `feature of the present invention, the air inlet controlling member, which is termed or a puppet valve, is operated by the iloat, independently of the suction controlling member, through the medium of an elastic device so arranged that thel suction opening is closed a little betore the air inlet valve is opened.

By means of said arrangement, the depression set up in the float-chamber being reduced from the moment when the suction openingV is closed, the resistance due to atmospheric air which acts in opposition to lh@ @Pm-ing movement ot the air valve is also reduced, whereby the valve can open easily under 'the action of the spring compressed by the float. It is thus possible to use a puppet valve having a. large diameter whereby a considerable volume of outer air may be admitted rapidly into the float chambei', which is an important condition 'for obtaining a proper 'working oi the apparatus. Y

Other features of the invention will ap pear from the following description.

In the annexed drawings, given by way or" example:

Figure l is a vertical section of one embodiment of a vacuum feed tank construct ed in accordance with the invention.

Fig. 2 is a vertical section of another embodiment, the outer reservoir being partially ,broken away.

The apparatus shown in Fig. l comprises the float chamber It and the outer reservoir lor delivery chamber R which is connected (to the carbureter 'through the nipple Y. The float chamber R is in communication ,at the bottom with the reservoir R through an opening closedby an automatic check lvalve H. An oriiice 2 is provided at the upper part of the chamber R for the inlet rlShe apparatus '-is closed at the top by a lid 4 provided with nipple B which is connected to the main nel tank located on a lower level. @n the `lid et, is provided a sleeve or bushing S in which may slide a tubular valve 'I which acts by its upper edge T to close the lateral suction conduit A connected to any suitable source of depression such Ytor instance as the admission pipe of the engine. The sleeve S is in communication at the top with the atmosphere through holes O which have a relatively large diameter and may be closed by the air inlet puppet valve P. The stem of said valve is guided at its lower part in the end wall E of the tubular valve T and carries a nut E which may abut against the wall E. The tubular valve T is provided with a lateral orifice D opening into the chamber R.

In the construction shown, the tubular valve T is provided with a depending tubular extension T2 of a smaller diameter, which is surrounded by the float F, which latter, in its rising movement, may abut against the wall E of the tubular valve. The part T2 oit.' the valve is slotted diametrically at its lower end as shown at I. In the slot I, may slide vertically a cross member l carried by the float; the cross member K may come into contact in a downward direction with a cross pin X carried by the tubular valve T. A coil spring M is interposed between the cross member K and the nut E on the stem ot the air inlet valve P.

When the depression is set up in the conduit A, said depression is transmitted by the opening l) into the chamber R and the fuel is sucked in through the nipple B. rlhe float is thus raised progressively whereby its cross member K acts to compress the spring M against the nut E. The air valve P is then held closed by atmospheric pressure. lVhen the upper wall of the float conv tacts with the part E of the tubular valve, the latter is raised by the float whereby the suction conduit A is closed. The fuel flowing farther into the chamber E, owing to the depression therein, the pressure in said chamber becomes soon equal to atmospheric pressure so that the air valve P is no more retained on its seat by the outer pressure and may be suddenly opened under the ac tion of the compressed spring M, a little time after the suction conduit has been closed. The fuel can thus flow by its own weight into the outer chamber R from which it is led to the carbureter. The float begins then to descend but the valve l raised by the spring M remains opened whereby the luel contained in the chamber R can flow completely and rapidly into the delivery chamber R.

When the cross member K on the float contacts with the cross pin X on the tubular slide valve, the latter is moved downwardly as well as the valve P which is carried downward through the medium of the nut E provided on its stem. At the bottom of the stroke, the suction conduit A is opened again and the air inlet holes O are closed whereby the operation above described may be repeated.

The suction conduit fr is perfectly scaled by the tubular slide valve ll owing to the fact that the latter is shifted laterally against the wall of the sleeve S by the action of the depression in the conduit A.

The embodiment shown in Fig. 2 dillers from that above described by some constructional details. The chamber R is in communication with the outer delivery chamber R by an automatic non return valve H. which is so arranged that said valve remains closed even. when the car upon which the apparatus is mounted has a considerable inclination. Said valve is circular and seated against the end of the horizontal part of an elbow H2, the vertical part ot which is soldered to the reservoir R, the axle pin H3 of the valve being located in the axial plane of the apparatus. The lid 4,- o'l the apparatus is held by a nut 5 and carries the sleeve or bushing S which is screwed therein and extends downwardly into the chamber R, said sleeve being provided with a diametrical slot I. In said slot I', is guided a Cotter pin 6 which extends through the tubular slide valve T. The lateral suction opening A is connected to a source of depression such as the admission pipe of the engine by a tubular member 7 having a reduced passage 8 which may be closed by a small ball 9 of steel or other metal, being about two millimeters in diameter. Said ball acts as a non return valve for arresting any backward pressure 'from the admission pipe of the engine. The stop screw lO limits the lift of the ball 9, said lift being the usual amount in ordinary non return valves e. about one millimeter. The sleeve S is in communication at the top with the atmosphere through holes 11 drilled in a cap l2 screwed upon the end of the sleeve. The bore of the sleeve may be closed at O by the conical valve P, the stem of which is guided at its lower part in the tubular sleeve T and provided with an elongated slot la through which the cotter pin 6 extends. The opposite ends of the latter extend through longitudinal slots l5 provided in a tubular socket 16 forming a part of the {loat F. The

coil spring M is interposed between the cross e member Ix carried on the float and the stem of the air valve P.

The operation is substantially the same as that above described with the difference tha the valve l is opened under the combined action of the spring M which has previously been compressed and that ot the lioat, the latter acting through the medium or' the pin 6 on the upper end wall of the slot 14, in the stem of the valve P. Said valve l" is only opened after the suction conduit has been closed in the same manner in the construction above described.

Changes may of course be made in the constructions shown or described without departing from the invention.

Having now described my invention, what I claim as new and desire to secure by Let ters Patent is:

l. A vacuum feed tank for internal combustion engines comprising in combination: a float chamber, a float therein, a delivery chamber, a non return valve affording a communication between said chambers, a suction conduit and an air inlet both adapted to communicate with the float chamber, a controlling member for the suction conduit operable by the float, a controlling member for the air inlet independent o the suction controlling member, and

a spring interposed between the float and the air inlet controlling member and adapted to be progressively compressed by the float as the latter is rising.

2. A vacuum feed tank for internal combustion engines, comprising, in combination, a float chamber, a float therein, a delivery chamber, a non return valve affording a communication between said chambers, a suction conduit and an air inlet both adapted to communicate with the float chamber, a sleeve opening into the fioat chamber and having a lateral suction opening in communication with the suction conduit, a tubular slide valve, movable in said sleeve under the action of the float and adapted to control said lateral suction opening, a puppet valve for controlling the air inlet independent of the tubular Slide valve and a sprin interposed between the float and the air inlet puppet valve and adapted to be progressively compressed by the float as the latter is rising.

3. A vacuum feed tank for internal combustion engines comprising in combination; a float chamber, a float therein, a delivery chamber, a non return valve aifording a communication between said chambers, a suction conduit and an air inlet both adapted to communicate with the iioat chamber, a sleeve opening into the iioat chamberand having a lateral suction opening in com munication with the suction conduit, a tubular slide `valve, movable in said sleeve under the action of the float and adapted to control said lateral suction opening, a puppet valve 'lor controlling the air inlet independent of the tubular slide valve and a spring interposed between the float and the air inlet puppet valve and adaped to be progressively compressed by the i'loat aS the latter is rising, and means under the control of the float and adapted to come in operative engagement with the air inlet puppet valve when the spring is compressed. l

e. A vacuum feed tank for internal com bustion engines comprising in combination; a float chamber, a float therein, a delivery chamber, a non return valve affording a communication between said chambers, a suction conduit and an air inlet both adapted to communicate with the float chamber, a sleeve opening into the float chamber and having a lateral suction opening in communication with the suction conduit, a tubular slide valve movable in said sleeve and adapted to control said lateral suction opening, a cross pin carried by said tubular slide valve, a slotted member on the float in operative engagement with said 'cross pin, a puppet valve for controlling the air inlet independent oit the tubular slide valve and a spring interposed between the float and the air inlet puppet valve and adapted to be progressively compressed by the float as the latter is rising.

5. A vacuum ieed tank for internal combustion engines comprising in combination: a float chamber, a float therein, a delivery chamber, a non return valve affording a communication between said chambers, a suction conduit and an air inlet both adapted to communicate with the float chamber, a sleeve opening into the ioat chamber and having a lateral suction opening in communication with the suction conduit, a tubular slide valve movable in said sleeve and adapted to control said lateral suction opening, a cross pin carried by said *tubular slide valve, a slotted member on the ioat in operative engagement with said cross pin, a puppet valve for controlling the air inlet, independent oi the tubular slide valve and having a stem provided with an elongated slot through which said cross pin extends and a spring interposed between the iioat and the stem of the air inlet puppet valve and adapted to be progressively compressed as the latter is rising.

6. i vacuum feed tank for internal combust-ion engines comprising in combination a float chamber, a float therein, a delivery chamber, a non return valve aording a communication between said chamber, a suction conduit and an air inlet both adapted to communicate with the iloat chamber, a slotted sleeve depending y into the float chamber, and having a lateral suction opening in communication with the suction conduit, a tubular slide valve movable in said sleeve and adaptedto control said lateral suction opening, a cross pin carried by said tubular slide valve and guided in the slotted sleeve, a slotted member on the float in operative engagement with said cross pin, a puppet valve for controlling the air inlet, independent of the tubular slide valve, and having a stem provided with an elongated slot through which said cross pin extends, a cross member carried by the float and guided in the slotted sleeve, and a spring interposed between the stem of the air inlet puppet valve and the cross member and adapted to be progressively compressed as the latter is rising.

In testimony whereof I have signed my name to this specification.

LitoNon GARNIER. 

